IGCSE O Level Physics Certification MCQs – Practice Test 3 (Chapter 1)

Electromagnetic Waves Quiz with Answers PDF Download – Test 3

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Electromagnetic Waves Exam Questions and Answers PDF Download: Test 3

MCQ 11: When the medium of electromagnetic waves changes from air to water, their speed:

increases
remains same
decreases
may increase or decrease

MCQ 12: Faster among the waves and rays is:

waves
both have no speed
rays
both have equal speed

MCQ 13: Electromagnetic waves obey the law of:

refraction only
reflection and refraction both
reflection only
momentum

MCQ 14: Speed of electromagnetic waves in vacuum is:

30 × 10⁸ m s^-1
4 × 10⁸ m s^-1
3.0 × 10⁸ m s^-1
6.0 × 10⁸ m s^-1

MCQ 15: As the speed decreases if we change the medium of electromagnetic waves from air to water, the frequency:

also decreases
also increases
remains same
may increase or decrease

IGCSE O Level Physics Quiz App & e-Book – Electromagnetic Waves Certification Guide

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